Simply what I means?

      The 'I' is the 'state' we (you or myself) feel and remember!

Reverting back to the state beyond a new born baby!

When a grown adult person finds his body parts are not movable or controllable, as before or as others, he feels hopeless in life; first he becomes depressed. Later, if he loses  his sensory and understanding abilities also, he becomes confused and forgets the previous incidents and hence, loses his memory. Now in this stage he doesn't want anything from his immediate environment. So, his 'I' and the 'Mind' is lost to somewhere; he slowly moves down to an unconscious state - a coma-like state that he had been in before he was born in this world! Where did his soul go at this stage? Did it go back to its source, the main analytical mind ring (probably, the God) from where it came from? Will it return back to make him live and active as before? If you know about it, share it here!

Reinforcing the 'I' in baby!

In the newborn the mind is formed first and then the 'I'. Then as the baby grows old by days, it gets its power of seeing; looks at moving face of its mother and sees her. Mothers and others touch it by moving their hands towards it that activates its touch sense. With instinct or hope it tries to lift its hand or leg, and finds it successful and that it can control all these - either to do it or stop it at its will. Now, the 'I' is fully and strongly formed in it by repeated such reinforcements!

Formation of Mind, I and the Soul in the newborn!

The 'Mind' is formed in a newborn baby from the first instance it receives its first stimulation through any of its senses and this stimulation is 'felt' for the first time; later, when the same stimulation comes again to the baby and is felt again, by its 'Mind', now its 'Mind' becomes the 'I' after the identification and understanding this later stimulation as one like that of that one received earlier, and that it is now recurring. (Here note that the 'Memory' of the baby is also formed). Along with these the subconscious first identification and understanding of 'Self' (the 'Mindly Soul') is also done by the 'Subconscious Mind', which has been also thus formed out of the baby's 'Mind', the 'I', by this process of identification, understanding, and feeling of 'Self' as a separate one! Such understandings are reinforced when that stimulation repeats itself coming to the baby constantly. When another different type of stimulation comes next to stimulate and to be felt, the 'I' of the baby understands it too to be a different one by 'comparing' it with the previous one - the memory + understanding the new one by comparison. Thus the reasoning power of the Mind is also got by the baby!

Mind parts and part of it, the God!

When a person's sleep is disturbed in its midst, the conscious part of his mind awakes first; it is a primitive and easily believing part of the mind that has no reasoning power. Next the intelligent understanding part of the mind wakes up and finds the conscious mind's naiveness. But there is also another part of mind that is always awake even during the person's sleep! But it has to be activated from its temporary dormant state that is present during the person's sleep. It gets activated only after the conscious mind wakes up. It is the analytical mind. This analytical part itself has three parts - a feeling part, a thinking part and a motor part (that makes the person move). That feeling part of the analytical mind is the 'Soul' mind and the other two parts of it make 'I' mind of the person!
Actually, this analytical mind is not a single one restricted to that person! Probably it is a longer ringlike one that either connects only all the human beings or all the living beings of this Universe! But by birth of the person, a segment of this ring-mind becomes allotted for him with boundaries of it within the ring itself. After this, he feels or thinks himself and his mind as a separate entity! When this person dies, this entity's boundaries disappear with him, and the segment of the ring merges with the main analytical mind ring. But when these boundaries of the entity are slow to disappear even after the death of the person, his 'Soul' mind lingers in this world [as also the 'I' mind (the self mind) for a shorter period lingers] - till those boundaries disappear! Is this main analytical mind ring, the GOD? Find or feel about Him [through Yoga that breaks the entity boundaries and identity of you in the main analytical ring :) ] and inform me if you found or felt Him!
Now coming to our mind parts' activities during the sleep: what is the analytical mind of the person doing when he is asleep - that is, it is in its dormant state before being activated when he wakes up? Does the boundaries of it in the main analytical ring disappear temporarily during the sleep or the person's 'Soul' mind (feeling part of the analytical mind) wanders somewhere in this world or the Universe during the sleep as in the film, Avtar? Who can experience this and inform us about it? If you have experienced this somewhere sometime, share here!